So if i put on 10.9 rotors on my '96 bonneville (poweslot) my mechanic wont kill me and bich how they arent the right ones? and also it wont screw up my braking? And will i need to change my pads cuz htey are prety new bendix.

also how much are the powerslot cuz i saw them for 179 but my mech wanted to put in some nice ones for 200 im sure not powerslot whats the deal

My Powerslots costed $200 shipped to me, they were out of stock so they were drop shipped from Powerslot which is 10 min from me. You wont need to change your pads if you dont want to, but its a good idea to match pads w/ your kind of driving, conditions, rotors, etc. And our brakes are the same as the W-Body, its the principle of the GM parts bin and a little making it fit. I will be using that phrase when putting a turbo on a certain car I know of... And DOT 4 Synthetic helps also, just a hint. Take care and make sure to do your brakes properly since they are kinda of important.

When you say W-body u mean the wide body GTP Grand Prix?
also what do u mean gm parts bin and a little fitting?
also is there any way that i can find out for sure if it will fit or rather is there a way to figure out which ones i got and which ones i should get. I got brand new Bendix pads will they kill my rotors if i dont change em or is it just a matter of what i prefer?

Thanks for the help.
Also where did u get the Powerslot from? TireRack.com?


Thanks again

When I say W-Body, that means the platform that all Grand Prix'*, Oldsmobile Cutlasses, and some Buick cars are built on and use very similar brakes/suspension/misc parts. We are a H-Body but the GM parts bin is basically GM has already designed over the years many different parts. For example, rather than GM making 6 different brake systems for 6 different cars on the same platform or similar platform, they make one which reduces cost and makes it easier for people like us to get parts for our car. You can get the Powerslots from www.autosupermart.com, or just type a search on Yahoo like "Grand Prix Powerslot rotors". Something like that and there are a bunch of different companies that sell it so check who has the best price w/ shipping. I got mine for $200 shipped. If they fit on my car, then they will fit on yours.... so it'* really unneeded to question if they fit or not. The part #'* for them are

8257PSL & 8257PSR

I dont know what your Bendix pads will do with the Powerslot rotors. You have to tell me what material they are and you need to match them to slotted rotors. I love my Performance Fricition Ceramic pads I got from AutoZone. I ate one of my rotors (made my own slotted rotors :P ) so I just got better ones. I dont like OEM rotors because they warp way too easily and its so annoying to have that extra unbalancedness (i know not a word too lazy to use "modern" english lanugage descriptions) in the tires/wheels when driving the car. I hope that answers all yours questions and if you have more, just post here.

the bendix pads i got are i think semi-metallic. and i got some stupid rotors which i personally havent changed but they might have been changed prior. they warped and not at around 65-55 they do the rattling effect on the car (steering wheel bops) its not as bad as on my other bonni b4 i had those changed but its getting there. How long will the powerslots last me? and how much would ceramics cost and last?

sorry one more thing the rotors gotta b a specific year of the GP or no? cuz i got a 96 bonni not a 99 those models u gave are for 99 GPs and as i suspect u got a 99 bonni

The rotor size has not changed in a long time (10.9"). And the bolt pattern has always been 5X115. It'* not necessairly by year for the Bonneville because we are the flagship of Pontiac so we get the better stuff first before the Grand Prix'*. That'* why they list the Grand Prix stuff as 99+ but its really like 97+, they just havent figured that out yet.

lol the ship part of flagship is definetly true about our cars, um which, where and how much did u get ur ceramic pads for? and whats your take on my semi metallic bendix?

I had originaly wanted to put the rotor upgrade from thrasher engineered.

I asked if their 12 inch rotor upgrade would fit on my 1989 bonneville if I went to larger 16 or 17 inch rims. They of course said it would not but I think it probably will if it fits on the Grand Prixs and other W Bodies. I can't afford to fork over 350 some dollars to find out if they will fit or not.

The powerslots might be an option. Never was a fan of slotted rotors though so would have to think about it.

I dont know if these upgrades will fit on your 89 Bonneville. In theory they might, but they did a changeover of design in 1990, that why you will see products for 1990-1999 Bonneville, 2000-2003, 8? - 89. And to do the 12" upgrade, you HAVE to have at least 16" rims, and then recheck the clearence to make sure it will fit.

I got my ceramic pads at AutoZone. You get different pads for different purposes. I got the ceramic pads because as they heat up, they build more friction thus slowing the car faster, so they dont fade and they bite fast. But I do alot of hard stops or long distance stops.

Those semi metallic should work well but as the pads/rotors heat up, you will have to press the pedal farther in, I dont have to. I just press the pedal till its firm and them I dont have to press it anymore. The semi metallic should do well and that'* what most people use, but since I have open rims, my brakes cool off pretty quickly which is perfect since my pads/rotors heat up quite a bit. So its depending on how you drive and what you want. Hope that helps. Have fun.